Cleaning sieve



Feb. l2, 1929. 1,701,778

' H. L. JOHNSON CLEANING SIEVE Filed April 8, 1926 4' Sheets-Sheet 1Feb.1z,19z9.f x i 1,701,778

H. L. JOHNSON CLEANING SIEVE Filed Apr-11 8, 1926 4 sheets-sheet 2 wwwFeb. 12, 1929.

H- L. JOHNSON CLEANING SIEVE F/led Alllil 8, 1926 4 Sheets-Sheet 3 Feb.12, 1929.2 1,701,778

H. L. JQHNsoN CLEANING smvE Filed April 8, 1926 4Sheets-Sheet ,4

W N N n R.

N o 0 -o J F 0 0 i 1 N X MMM Patented Feb. 12, 1929.

illtllg'l`E rSTATES T CE PATE

HARRY L. JOHNSON, F MINNEAPOLIS, MNNESOTA, ASSIGNR OF NEWEALF T() iANDRINE M. SORENSEN, OF ST. PAUL, MINNESOTA.

CLEANING sinvn.

Application filed April 8,

illy present invention provides an extremely simple and highly efficientrecleaning sieve especially adapted for use in connection with threshingmachines to separate from the good grain, such as good wheat or goodoats or a mixture o'" the two.` usually designated as succotash, what isgenerally known as doclkege and which dockage will usually include moreor less of the following seeds: mustard, French weed, pigeon grass,bucks wheat, barley, pin oats, cracked and shriveled wheat, and vthelike.

llVhen this improved recleaning sieve is applied to a threshing machine,it will be ar- 1,5 ranged to receive the commingled grains that havebeen passed through the chatter or scalping sieves and trom which thestraw, chai", andall objectslarger than wheat and oats will. havebeenremoved. Theoperation and purposes of this improved. sieve will be morefully considered alter having lirst described a commercial 'form oi thesieve illustrated in the accompanying drawings, wherein like charactersindicate like'parts throughout the several views.

Referring to the drawings:

Fig. 1 is a vertical longitudinal section showing the improvedrecleaning sieve and certain oi' the immediately associated parts S0 oila threshing machine, the latter being substantiallyA of standard or wellknown construction, and the said parts being viewed from the left-handside of the machine;

Fig. 2 is a plan -viewshowing the improved recleaning sieve removed fromthe threshing machine;

Fig. 3 is a fragmentary plan View showing a portion of the sievesurface, which, as illustrated, is a perforated Zinc sieve' having 'longnarrow passages; y

,Figa t is a longitudinal section taken on the line i-4 of Fig. 2;

Fig. 5 is an enlarged fragmentary section taken on the linee-5 of Fig.v2;

Fig. 6 is a transverse section taken on the line (36 of Fig. 2; and

Fig. 7 is a plan view with some parts broken away, showing the sieveframe, deck and certain immediately connected parts, the sieve properand the cleaning device therefor being removed.

In Fig. 1, certain parts of the threshing machine are shown and such'parts may be l'irieily n d as follows: the housingl, the .trame 9, rearsupporting wheels 10 mounted ieee. serial No. 100,573. j

on the rear axle 11, the vibratory grain pan 12, the challier 13, thevibrator-y sieve shoe le, an inclined bottom deck 15. The vibratorysieve shoe 1alis, as shown, provided with the customary imperfora'teinclined bottom or deck 16, which, however, is provided near its lowerend with a large transverse discharge passage 17. f f

The improved recleaning sieve, which willl now be described, is adapt-edfor ready application to the inclined bottom 16 oi the vibratory shoe14.- oi the threshing machine already in use, or in new structures itlmaybe incorporated with the vibratory shoe as an'entirety and withoutrequiringthe shoe bottom or deck 16. This improved sieve structure, asillustratedY andas preferably designed, is constructed as a completeself-contained structure made up of the separating screen or surfaceproper, a cleaning device, a bottom deck, a gate in the bottom deck,anda two-part or sectional trame, the sections oifwhich are detachablyconnected, the separating sieve orY surface being carried by the upperframe sccy tion land being interchangeable with other sievesoi' the samecharacter but having perorations or passages of different size 0r character tor'electing different kinds oi separations. The frame sectionsare both rectan gular structures and are indicated, respectively, by thenumerals 18 and 19. The lower trame 18, at its discharge end, haslongitudinally spaced transverse members that afford a large transversedischarge passage 20 that is equipped with a gate by means ont whichsaid passage 2O may be opened and closed, at will. This gate 21, asshown, is made up 01"' a sheet metal plate toldedy into substantiallyiiat form and provided on its ybottom with rigidly secured hinge members22 pivoted to hinge members 23 rigidly secured on the lows er transversevbar of the frame 18. Here it is important to note that the pivotalconnection between the hinge members 22 and 23 is between the front andrearedges of the gate 21 so that when the cate 21 turned tosubstantially vertical open position, its major portion will drop downthrough the passage 2() and its minor but very considerable part willproject vertically [upward above the :trame 18. Thepurpose of thisarrangement will appear later on. The top of the frame 18 is covered byan impertorate plate or deck 24- preterably ot thin sheet metal. Thelower edge oi' this` deck 24 extends downward and projects slightly oreror into the passage 2O and, as bestI shown in Fig. 5, it will be notedthat. the deck 2l is-spaced troni the lower 'traine 1S by canvas stripsQ5, which torni a tight joint between said deck 24 and gate 21. Byreference particularly to Fig. 5, it will be noted that when the gate 21is in its closed position shown by t'ull lines, it undeilaps the loweredge ot the deck 24C and closes the passage 20.

To'operate the gate 2l troni one side ot the threshing.;` machine, saitgate is provided with an upstanding lug 25 Connected to the front end ofan operating rod ZT, the rear end ot which is cenueclefil to atransverse hand-nia n'ipulated rod 28 by bell cri nk pivoted to the rearcnil ot the traine 1S at 39, (see particularly Figs. 2 and '7). Foryieldaiglv holding the gate Q1 both in extreme close andcpen positions,accordingto the posi in which `it ina)i be set, a leali spring 3l isrigidlyY anchored at one end, as shown, by a nut-feouipped bolt 32 tothe cross bar 18 ot the traine 18. The spring 3l is so termed, (seeparticularl)7 Fig'. 4l). that the gate 21 will be trictionally held inan open position shown b v iill lines, and when in a elo: d positionindicated Vby dotted lines, will be lining-held in such position.

The upper Atraine 19 is detachably locker to the lower traine 1S and,preferably, this is accomplished by liool -acting brackets 3d andnut-eqnipped bolts The brackets :Lt their lower ends, are bolted totheliront bar of the traine 18 and their up, er endsV are benthorizont-all;T rearward and engaged with langed metallic seats 84secured in the top o'l the liront bar ot the traine 19. The bolts arepassed through bolt holes in the rear bars ol' the frames 1S and 19 and,as shown, are prorided with tliiiinb nuts at their upper ends, (seeFigs. 2 and 4l).

Secured to the upper traine 19 and stretched over the top thereof is asieve surface preferably in the torni of a Zinc plate 35 havingelongated perloratioiis 36. The actual structure ot this plate is bestshown in 3. B v reiterence to Fig., l, it will be noted that the siderails'oll the lower traine 1S are strips having parallel edges, whilethe side rails of the upper traine 19 are strips that have increasingdepth from their rear toward their liront ends, so thatthe space betweenthe deck 24; and sieve plate 35 increases Vin a direction troni thetrent toward 'trames and positie or grain ina Vtoiavard direction thesaine downward through the passage 20. For cleaning the sieve plate thatis, tor keeping its perfor-ations clear ot' grain or seeds lodgedtherein, l provide a sieve-cleaning device comprising transverse woodenslats Il? .sharpened at their upper edges and lsecured to parallellongitudinal thrustbars 38, which latter are pieterably straight andflat iron strips. lThe slats 37 rest on parallel laterally spaced rails39 se` nred on the top el" the deck 2li and eterably provided withmetallic lacing strips l-O. The rails 39 are ot increasing depth tronitheir trontloward their rear ends and their upper surfaces are parallelto the sieve plate Se, so that the cleaning device, when movedlongitudiiiallT or when in action, will maintain contact with said sieveplate. By reiten ence to Fig. 6, will be noted that `the thrust bars 38work close the rails 39 and, hence, cooperate with the latter to guidethe-sieve cleaning device and te hold theV saine against ateraimovements.

inasmuch as the sieve traine is arranged to be vibriited longitudinallyot the threshing machine, the relative movement of the cleaning devicein respect to the sieve may be best produced by anchoring thesieve-cleaning device to a lined part oi'i the machine; and this, asshown, accomplished by connecting the rearwardly extended ends oit theth ust bars by links Ll1 to eve-bolts or similar anchoring devices 42which, as shown in Fig. l, are dircctig7 applied to an angle bar 43,which, in turn, is bolted to a transverse ineinbcr 9 ot the machine:traine structure.

ln Figs. 5 and the numeral el?) indicates an interinediately locatedbridge brac reti-igidl",7 secured to the front portion or the lowerframe 18spanniiigthe passageQO and ati'ording a. rest vtor theintermediate portion ot front bar ot' the upper traine 19.

O ponti/0a.

ln the threshing operation, the chal'l' and the like will be carriedoil' by the clia'li'er l and delivered to the bottoni deck l5, but thecoininingled grain and seeds, assumed to be chieflyY wheat but withvVarious other seeds, such as generally treated las dockage, will passthrough the sieves 13 and onto the sieve rlie goed Ywheat and goed oats,it any, will not pass through the periorations ot the .sieve 36, butwill ne delivered eti' troni the lower end ot said sieve, while all otthr'ise seeds er grains that constitute dockage and suoli, for example,fis mustard, French weed, pigeon grass, buckwlieat,'barley, pin oat",and cr:y 3 "'d and shriveled wheat, will pass through the pertoratioiis56 et the siete and onto the deck 24. lllhen the gate 21 is turned intoits open position indicated by l l' and b v dotted lines in lig.

'll be pcsitivelj,` l directed downii' lli ' substituted for the other.

the passage 2O and thus the dockage will be separated Yfrom the goodwheat. This device does not attempt to separate good oat-s from goodwheat, but the separation ot these two grains may be readilyaccomplished by other and well known means. The particular purpose ofthis device, is to remove dockage 'from the goed grain and this resultis accomplished in a most eiiicient and effective way.

rEhe lower sieve frame 18 should be quite permanently secured to thevibratory shoe 141 and the removal thereof would be a matter ot veryconsiderable inconvenience and, moreover, said lower frame 18, in someinstances, will be built as a permanent part of the shoe. Frequently,removal, of the dockage from the good grain in the threshing operationwill not be desired; and when this action is desired, it is onlynecessary to move the gate 2l into its closed position shown by dottedlines in Fig. l and by full lines'in Fig. 5, thereby causing the dockageto be rccommingled with the good grain. Otherwise stated, when the gate2l is in a closed position, the recleaning device or dockage separatorwill be rendered ineffective, but is kept in position ready for use as adockage separator simply by moving the gate 2l into its open position.

As already indicated, the sieves 35 having diierent sizes or kinds ofmesh or openings may be employed and the one can' be quickly lt isfrequently desirable to sow commingled flax and wheat, and for theseparation of these seeds, a sieve 35 having smaller mesh or openingsthan that used for the separation above described will be employed. Inthis kind o'l' separation, the flax wouldbe separated as dockage,`but,of course, would not be treated as waste or low grade grain or seed.

Vilhat l claim is:

l. A rccleaning device comprising` detachably connectedupper and lowerrectangular frames of approximately thefsame contour mounted one on topof the other, the lower iframe near its deliveryend having spaced4transverse bars or members atfordmg a transverse discharge passage, asieve applied to said upper trame, a deck applied to said lower frameand projecting slightly into said discharge passage to afford agate-stopping ledge, a gate hinged to the lowermost transverse bar ofsaid lower frame at a point between its upper and lower edges, wherebysaid gate will project above said d eck whenA turned downward withinsaid discharge passage, said gate when turned upward into a closedposition stopping against the projecting ledge-forming portion of saiddeck.

2. A recleaning device comprising detachably connected upper and lowerrectangular trames of approximately the same contour mounted one on topof the other, the lower` frame near its delivery end having spacedtransverse bars` affording a transverse discharge passage,a sieveapplied to said upper frame, a deck applied to said lower frame andprojecting slightly into said dischargepassage to afford a gate-stoppingledge, a gate hinged to the lowermost transverse bar of said loweriframe at a point between its upper and lower edges, wherebyv said gatewill project above said deck when turned downward within said dischargepassage, said. gate when turned upward into aclosed position stoppingagainst the projecting ledge-forming portion ci said deck, said lower'frame atfits.

transversely intermediate portion having a rigidly secured raisedbracket that spans its discharge passage and afiords a support tor theintermediate portion oit the lower transverse member oiisaid vupper'trame. j 1

8. A recleaning device comprising detachably connected upper and lowerframes, a sieve applied to said upper iframe, a deck appliedto saidlower frame and having spaced transverse bars or members affording adischarge passage near its delivery end, a gate hinged to said lowerframe and arranged to open and close the discharge passau-e of saiddeck, said gate being arranged to move above said deck when moved toopen said discharge passage, a sieve cleaning device mounted on saiddeck and arranged to scrape the under surface of said sieve, said trameshaving increasing depth toward the delivery ends of the sieve -and deck,whereby the sieve and deck are given increased space from the re ceivingtoward the delivery ends and whereby, when said gate is moved to an openposition ity will be given increased clearance space and will afford astop for directing ma- .'terial through the discharge passage of saiddeck, the said frames being `detachable an-d 'when connectedconstitutinga complete unit and in which sieve structure, when the saidframes are separated, said sieve will remain attachedto said upper trameand said deck, cleaning device vand gate will remain attached to saidlower frame.

4. A. recleaning device comprising a sieve, a deck underlying said sieveand having spaced transverse bars or members affording a dischargepassage near its delivery end and backward of the extreme delivery endof said sieve but so close thereto that all of the grain passing throughsaid sieve will pass through the discharge passage of said deck, a gatehinged in respect to said deck and arranged 'to open and close thedischarge passage thereof, said gate, when open, projecting above saiddeck and aording a stop plate for directing the material through saiddischarge passage, and a gate-operating connection including a yieldingdevice-arranged to hol-d said gate in open or closed position, accordingto the positiony in which it is set, but adapted to yield under pressureapplied to said gate-operating connection. f

llo

5. A recleaning` device'comprising.detachably connected upper and lowerframes, a sieve'appliedto said upper rameyadeck applied to said lowerframe and having spaced transverse bars or members aiiording a dischargepassage near its delivery end, a gate hinged tosaid lower frame andarranged to open and close the discharge passage of said deck, asieve-cleaningl device supported by said deck and having slats arrangedto scrape the under surface of said sieve, Said gate being hingedbetween its edges so that when moved into an vopen position it willproject above said deck, aspring,l operating on the upper edge of saidOate to yieldingly hold the same in both open and closed positionsaccording to the position in which it may be set, and an operating rodpivotally connect-ed to said gate and extendingl in the space bev tweensaid deck and sieve.

6. A recleaning' device Comprising` detacha ably connected upper andlower frames, a sieve applied to said upper frame, a deck applied tosaid lower traine and having spaced transverse bars or membersaffording,` a discharge passage, a gate hinged to said lower frame andarranged to open and close the discharge passage of said deckj and whenturned into an open position serving as a stop plate tedirect thematerial through said discharge passage, said deck, on its uppe snrfaee,having longitudinal rails, and a sieveeleaning device having transversesieve-engaging slats arranged to slide on the rails of said deck andhaving cleats that engage the sides of said rails to guide saidsieve-cleaning device in the sieve-cleaningaction.

in testimony7 whereof l affix my signature.

HARRY L. JOHNSON.

